\begin{tikzpicture}
    \tkzDefPoints{0/0/A, 3.5/0/B, 1.75/0/O}
    \tkzDefPointOnCircle[R = center O angle 230  radius 1.5] \tkzGetPoint{C}
    \tkzDefPointOnLine[pos=2](C,O)  \tkzGetPoint{D}

    \tkzDrawSegments(A,B  C,D)
    \tkzLabelPoints[below](A,O,B)
    \tkzLabelPoints[right](C,D)
\end{tikzpicture}

